Article
Chemistry, Inorganic & Nuclear
Mehdi Shoorangiz, Leila Shariatifard, Hossein Roshan, Ali Mirzaei
Summary: In this study, p-type alpha-Fe2O3 nanoparticles were synthesized and used for gas sensing studies. The gas sensor showed a p-type semiconducting behavior and good selectivity towards ethanol vapor at an optimized sensing temperature of 150 degrees C, with a response of 14.5% to 100 ppm ethanol gas. The sensing mechanism was discussed in details.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Biochemistry & Molecular Biology
Anum Kayani, Muhammad Asim Raza, Arsalan Raza, Tajamal Hussain, Muhammad Sarfraz Akram, Aneela Sabir, Atif Islam, Bilal Haider, Rafi Ullah Khan, Sang Hyun Park
Summary: The synthesis and crosslinking of chitosan and polyethylene glycol membranes improved the thermal properties and antibacterial properties of the membranes, increased the hydrophilicity and water absorption, and enhanced flux and salt rejection values in permeation data.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Engineering, Electrical & Electronic
Xiaohua Meng, Chen Qi, Yan Ren, Yali Zhou, Mengdi Chen, Le Zhang, Bin Liu, Shengzhong Liu, Heqing Yang
Summary: Hexagonal alpha-Fe2O3 nanoplates with {001} crystal planes were synthesized using ethanol as a control agent. The as-synthesized nanoplates showed higher sensitivity to ethanol, methanol, and triethylamine compared to commercial powders, with further enhancement achieved through hydrogenation. The increased sensitivity is attributed to an increase in the density of 3-coordinated Fe atoms on the exposed (001) crystal plane after hydrogenation. These Fe atoms on the Fe-terminated polar (001) surface serve as active sites for gas sensing, catalyzing the reaction between adsorbed oxygen and test gases. The adsorption and desorption of oxygen cause a change in resistance in the alpha-Fe2O3 nanoplate sensor.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Qian Ma, Shushu Chu, Hang Li, Jia Guo, Qi Zhang
Summary: Cubic-like heterostructures of In2O3/alpha-Fe2O3 assembled with 2D porous nanoplates were prepared by solvothermal method and subsequent calcination process. The introduction of Fe3+ component contributed to the morphological evolution and unique gas-sensing behavior, with large specific surface area, effective heterojunctions, and tunable electron transmission mechanism being key factors.
Article
Engineering, Chemical
Tong Xu, Di Qian, Yelei Hu, Yuanzhao Zhu, Yi Zhong, Linping Zhang, Hong Xu, Huaxin Peng, Zhiping Mao
Summary: An inorganic composite flame retardant was prepared and combined with waterborne polyurethane to enhance thermal stability and flame retardant properties, as well as reduce the heat release rate of cotton materials. The composite also showed increased breaking strength of the material.
ADVANCES IN POLYMER TECHNOLOGY
(2021)
Article
Chemistry, Physical
Qiujin Shi, Shuai Yue, Zhanqi Liu, Mingzheng Xie, Weihua Han
Summary: The generation of sulfate radicals during persulfate activation assisted by photocatalysis is mainly attributed to the superoxide radical (O-2(center dot-)). By utilizing negative piezo-potential generated from strained ZnO nanorod, the activity of alpha-Fe(2)O(3) for O-2(center dot-) generation is enhanced, leading to improved PS activation efficiency and stability of the nanocomposite. The additional negative electric field at the top of ZnO nanorod evaluates the conduction band of alpha-Fe(2)O(3), facilitating enhanced photogenerated charge reduction activity and separation rate, ultimately promoting the generation of O-2(center dot-) radicals in PS activation.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Environmental
Boying Liu, Junyan Wei, Shengnan Zhang, Asam Shad, Xiaosheng Tang, Ahmed A. Allam, Zunyao Wang, Ruijuan Qu
Summary: The catalytic performance of alpha-Fe2O3 nanoparticles in the low-dose ferrate system was studied for the degradation of pentachlorophenol. Quadratic functions were established to predict the optimal catalyst dosage and the maximum rate constant based on the correlation between alpha-Fe2O3 amount and observed rate constant. Characterization and cycling experiments showed the stability and recyclability of alpha-Fe2O3. The study proposed a catalytic mechanism involving the reaction between Fe(III) on the surface of alpha-Fe2O3 and Fe(VI) to enhance the generation of reactive Fe(IV)/Fe(V) species for the extraction of electrons from PCP molecules.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Analytical
Lili Sui, Wenzhi Zhang, Ping Wang, Bing Zhao, Hongyuan Wu, Dan Zhao, Guohua Dong, Haixia Yu, Yingming Xu, Lihua Huo
Summary: In this work, hierarchical heterostructured alpha-Fe2O3/alpha-MoO3 hollow spheres were successfully fabricated for gas sensing applications. The sensor exhibited high sensitivity and selectivity towards aniline at 217 degrees C, with a higher response to 30 ppm ANI compared to pristine alpha-Fe2O3 and alpha-MoO3 sensors, along with a fast response time. The detection limit to ANI was further decreased to 0.01 ppm and the gas sensing mechanism was speculated to involve the oxidation of ANI to azobenzene by chemisorbed oxygen. The study demonstrates the potential of this metal oxide composite for high-performance gas sensor applications.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Shengrui Xu, Miaomiao Wang, Chang-Po Chen, Suling Feng
Summary: Sea urchin-like SnO2/alpha-Fe2O3 heterostructural microspheres were successfully prepared and used as a semiconductor for acetone gas sensing. The microspheres exhibited a sea urchin-like morphology with inner SnO2 microspheres and outer alpha-Fe2O3 nanorods. The SnO2/alpha-Fe2O3 microspheres showed higher and faster response/recovery for acetone compared to pure SnO2.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Junzhi Hong, Fan Yang, Zhipeng Sun
Summary: A hydrothermal strategy was developed to synthesize hexagonal bipyramid alpha-Fe2O3 microcrystals (HB-alpha-Fe2O3 MCs) with FeOOH nanorods precursor, exhibiting perfect structure and remarkable sensor response, selectivity, and response/recovery towards ethanol gas, indicating their potential in advanced gas sensors. This controllable hexagonal bipyramid microcrystals offer a new approach for fabricating electrodes for sensor, catalyst, and energy-related applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Ningning Zhao, Zhong Yu, Haixia Ma, Ergang Yao, Ting An, Fengqi Zhao, Xiaojiao Yu
Summary: Fe2O3/zeolitic imidazolate framework-8 (ZIF-8) architectures were prepared by a PVP-assisted method and showed superior thermocatalytic performance in the thermal degradation of nitrocellulose (NC) compared to Fe2O3 and ZIF-8. The Fe2O3/ZIF-8-NC pyrolysis exhibited a total degradation of 77.96%, a maximum pyrolysis rate temperature of 194.5 degrees C, and the lowest activation energy of 179.4 +/- 16.1 kJ mol-1. This study provides insights into how metal oxide/metal-organic frameworks (MOFs) catalysts can enhance the pyrolysis of NC and serves as a significant reference for the development of catalysts for NC-based energetic materials.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Chemistry, Analytical
Siddharth Choudhary, S. Annapoorni, Rakesh Malik
Summary: Donut-shaped hematite nanoparticles were successfully synthesized using a facile chemical method for high performance LPG gas sensor development. By controlling the annealing temperature, the morphology of nanoparticles could be regulated, leading to improved sensor response.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Green & Sustainable Science & Technology
Shubham Chamola, Shahab Ahmad
Summary: Photorechargeable Li-ion batteries (Li-PRBs) have been investigated as potential energy devices for remote IoT or electronic devices due to their lightweight and low-cost advantages. This study demonstrates the use of conversion type active material α-Fe2O3 for efficient and stable operation of Li-PRBs. α-Fe2O3 nanorods blended with conducting additives showed simultaneous solar energy harvesting and efficient Li-ion storage. Li-PRBs using α-Fe2O3 exhibited a photoconversion and storage efficiency of approximately 1.988% when illuminated with a blue LED.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Multidisciplinary Sciences
Muhammad Munir Sajid, Thamer Alomayri
Summary: In this study, alpha-Fe2O3-RNPs were successfully synthesized via hydrothermal method and characterized using various techniques, demonstrating their photocatalytic and antibacterial activities. Various factors such as reaction time, catalyst amount, and dye concentration showed versatile effects on the performance during dye degradation.
JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Mingqian Wang, Ying Liang, Xuefeng Jiang, Jian Shen
Summary: In this study, a novel enhanced photothermal photodynamic antitumor nanoplatform was constructed, which has photo-thermal imaging, fluorescence imaging, and MRI-guided therapeutic capabilities. It can convert NIR light into local hyperthermia and generate singlet oxygen, further synergizing the tumor-killing effect. This nanoplatform provides a new solution for tumor imaging and treatment.
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)